Bobbin support for weft-replenishing looms



Dec. 30, 1930. E. R. HOLMES 1,786,655

BOBBIN SUPPORT FOR WEFT REPLENISHING LOOMS Filed Aug. 1G, 1929 fv VE/v TUR LW@ M IL A Tra/PNE V5 L/EE/HLMES:

Patented Dec. 3C, 1930 narran STATES PATENT OFFICE ELBRIDGE R. HOLMES, OF WORCESTER, MASSACHUSETTS, ASSIGNOR TO CROMPTON &

` KNOWLES LOOIVIVWORKS, OF WORCESTER, MASSACHUSETTS, A CORPORATION OF MASSACHUSETTS BOBBIN SUPPORT FOR WEFT-REPLENISHING LOOMS Application tiled August 10, 1929. Serial No. 384,853.

of the stacks onto the supports and r-oll to a common transfer position above the shuttle when the lay is in its foremost position.k At the time of transfer the support-s yield slightly to permit the bobbins to pass between them. In the past this yielding has been provided for by a coil spring one end of which engages the support and the other end of which is received by a collar angularly and longitudinally adjustable on a tie rod of the magazine.

It is an important object of myfpresent in- Y vention to eliminate the collar and wind the spring with coils of reduced diameter which will grip the tie rod.

It is a further object of my present invention to provide the spring with a wind that will permit it to be turned in one direction on the rod for angular adjustment but will resist movement in the opposite direction of the direction in which the spring yields when the bobbin support moves'at the time of transfer.

Vith these and other objects in view which A will appear as the description proceeds, my

invention resides in the combination and arrangement of parts hereinafter described and Fig. 4 is an end elevation taken in the direction of arrow 4, Fig. 1.

Referring to Fig. 1, I have shown a loom side or frame 10 on which is mounted foot 11 of the inside plate 12 of a multicolor magazine M. The magazine includes horizontal tie rods 12 which are parallel and support at their outer ends a bobbin tip supportingplate 14. .It is to be understood that two or more vertical stacks of bobbins are disposed l.be-l

tween the plates 12 and 14, the bobbins being substantially parallel with tie rods 13 and controlled by means of cradles not set forth therein but well understood. *The cradles act to lower the bobbins from one or another 'i of the stacks so that they move toward transfer position.

In order to hold a bobbin in transfer position for proper engagement with a transfer arm 15 I provide front and back links 16 and 17, respectively, which are loosely pivoted on the tie rods, there being one tie rod for each of said links. Bolts 18 pass through the lower ends of the links to provide pivotal connec* tions for the front and back bobbin supports 19 and 20, respectively. These supportsare held in position by means of set screws 21 which pass through lateral lingers 22 "on the links to engage the plate 14. It is to be understood that the outer plate 14 has associated thereto two bobbin supports which are in front of and behind, respectively, the center ot-the magazine.

The rear support for the bobbin butt includes a link 23 which is loosely pivoted on the tie rod on which is mounted link 17. A bobbin support 24 is attached to the link 23, and a bobbin support 25 for the front of the bobbin butt may also beprovided.

The supports for the bobbins herein described may be substantially the same as those shown in Patent 1,703,935 issued to Hume et al.

In carrying my present invention into effeet I provide improved means for holding the tie rod. The spring then extends torwardly and to the left, being coiled around the front tie rod in adirection toward inner plate 12 in a` counter-clockwisa direction. There are several coils 32 on thisYY1 spring ot relatively larger diameter than thickness of the tie rod, but at the left end of said spring I form several coils 33 of reduced diameter the internal diameter of which is slightlyless than the diameter of the tie rod. The small coils grip the rod and hold the spring in place.

During the time oi transter the support 19 i as shown in Fig. Ll will move to the lett, thereby winding the spring 82 in a direction to tighten the small coils and prevent them from slipping.

In like manner I provide therrear link 17 with a. spring Ll() which is wound around the tie'rod toward theV plate l2 in a clockwise direction. ItV shouldrbe noted that spring l0 is of the opposite hand or twist to that employed for the front support 19, this being desirable in View ot the tact that the rear support V,2O moves in a direction opposite to that in which support 19 moves at the time of' transfer.

A third spring 50 is supperted by the rear tie rod, and engagement with the upper end of linlrQ. This spring is wound as shown particularly in Fig. 2 so that when the support 24 moves rearwardly the coils will be tightened with respect to the tie rod. In Y each of the springs 40 and 50 I provide coils -11 and 51 respectively which operate in a manner similar to coils 33. Y

In assembling the magazine employing my present improved form of spring the larger coils will be placed over the tie red first and the spring turned in such a direction as to eX- pand the coils after the smaller coils have engaged the tie rod. It the smaller coils are made ot' the correct diameter it would he found practically impossible to turn the springs on the tie rods in a direction which would tighten the coils. I do not wish to be limited to this particular method of assembling the springs on tie rods.

FromL the toregoingit can be seen-.that I Y have eliminated the usual t'orm otl holder for the coil spring employed in connection with support oi multicolor magazines by the simple expedient oi winding certain of the coils et the torsion spring small enough so-that they will grip the tie rods. It will further be seen that the hand or twist of the spring depends upon the type of strain itis called upon to resist, the connections between such that under the normal action oi? the magazine at the time ol transfer the coils of the springs will be tightened or compressed so that the loosening ot the smaller coils is impossible. It will further be seen that by turning the springs in a direction the reverse of that in which they turn under normal'bobhin passing operation they may be adjusted longitudinally and angularly with respect to the tie rods.

YHaving thus described my invention it will be apparent that changes and modiiications may he made therein by those skilled in the art without departing from the Vspirit and scope of the invention and I do not wish to be limited to the details herein disclosed Vbut what I claim is l. In a weft replenishingmechanism having afrod, a bohbin support pivotaliy mounted with respect to the magazine, and a coil spring surrounding the rod and having coils of twoudiierent diameters, the larger coils being operatively connected to the support I.

to yieldingly resist movement of the latter at the time of transfer, and the smaller coils fitting tightly over the tie rod to grip the same and to resist movement ot the spring relativelyto the rod at the time of transfer.

2. In a weft replenishing mechanism having a rod, Ya bobbin support pivotally mount` ed with respect to the rod, a coil spring having relatively large coils at one end thereof and smaller coils at the other end thereof, the smaller coils fitting tightly over the tie rod resisting angular movement of the spring relative to the rod, and the larger coils being connected to the support.

8. In a wett replenishing mechanism having a rod, a bobbin support p'ivotallyY mounted with respect to the magazine, a coil spring having relatively large and relatively small coils, the small coils tightly gripping the rod Y to resist angular movement relative thereto, andthe large coils being connected to the support and yielding under torsional strain to resist movement of the support yieldingly at the time of bobbin transfer.

4. In a weft replenishing mechanism having a rod, a bobbin support pivotally mounted with respect to the rod, a coil spring surrounding the rod and having relatively large and relatively small coils, the small coils tightly gripping the rod to resist angular movement relative thereto and the large coils being connected to the support and yielding under torsional strain to resistJ movement oi the support yieldingly at the time ot bobbin transiter, the coils being wound in a direction to cause them to be tightened relatively to the rod when the support yields to permit transfer ot a bobbin.

5. In wett replenishing mechanism having two spaced tie roes, a bobbin support pivotally mounted on each rod, said supports cooperating to support a bobbin in transfer position, and a pair ot coil springs, one for each tie rod and corresponding support, said coil springs each having relatively small coils to grip the tie rods tightly and having relatively large coils operatively related to the supports to yield under torsional strain, said springs being of opposite hand.

6. In weft replenishing mechanism havlll) ing two spaced tie rods, the bobbin support pivotally mounted on each rod, said supports cooperating to support a bobbin in transfer position, and a pair of coil springs, one for each tie rod and corresponding support, said coil springs each having relatively small coils to grip the tie rods tightly and having relatively large coils operatively related to the supports to yield under torsional strain, one of said springs having coils wound in one direction and other of said springs having coils wound in opposite direct-ions.

7. In weft replenishing mechanism having two spaced tie rods, the bobbin support pivotally mounted on each rod, said supports cooperating to support a bobbin in transfer position, and a pair of coil springs, one for each tie rod and corresponding support, said coil springs each having relatively small coils to grip the tie rods tightly and having also relatively large coils operatively related to the supports to yield under torsional strain, one of said springs having coils wound in right hand direction and the other springs having coils wound in left hand direction.

8. In weft replenishing mechanism having two spaced tie rods, the bobbin support pivotally mounted on each rod, said supports cooperating to support a bobbin in transfer position, and a pair of coil springs, one for each tie rod and corresponding support, said coil springs each having relatively small coils to grip the tie rods tightly and having relatively large coils operatively related to the supports to yield under torsional strain, said springs at the time the supports yield to permit transfer turning in opposite direction and having the coils thereof so disposed as to tighten with respect to the rods.

9. In a weft replenishing mechanism, a bobbin support movable to permit a bobbin to pass out of the mechanism, a coiled spring operatively connected to the support to yieldingly resist movement of the support, and a holder for the spring, certain coils of the spring being held by their own resilience to the holder to resist movement of the spring as a whole relatively to the holder.

In testimony whereof I have hereunto ai'- Xed my signature.

ELBRIDGE R. HOLMES. 

